After IBKR Mobile goes to the background (when you take an incoming call, for example) you can bring it back by clicking on the IBKR Mobile application icon or by a long press on Home button. Note that in the latter case IBKR Mobile may not be listed among the currently running applications, especially if it was sitting in the background for long time. This is perfectly normal as Android shuts down inactive applications automatically when it needs resources.
Where did IBKR Mobile go?
Powered by IBot
Why am I unable to do an FX conversion on an Android device?
As an Advisor, can I have IBKR Mobile Authentication active on multiple phones?
I downloaded IBKR Mobile for the iPad, but I can not find it.
I lost my connection; do I have to wait for my TWS session to time out before I can log into IBKR Mobile?